CN117492396B - Water supply control circuit and system of coffee machine - Google Patents
Water supply control circuit and system of coffee machine Download PDFInfo
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- CN117492396B CN117492396B CN202311457301.2A CN202311457301A CN117492396B CN 117492396 B CN117492396 B CN 117492396B CN 202311457301 A CN202311457301 A CN 202311457301A CN 117492396 B CN117492396 B CN 117492396B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 239000003990 capacitor Substances 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 5
- 239000008400 supply water Substances 0.000 claims description 2
- 238000005086 pumping Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a water supply control circuit and a system thereof of a coffee machine, and relates to the technical field of coffee machines. The invention adopts double high-pressure water supply pumps to connect in parallel, works based on the characteristic of alternating current sine waves, mutually compensates the water pumping gap, improves the water pumping efficiency, and is suitable for water pumps of different models.
Description
Technical Field
The invention relates to the technical field of coffee machines, in particular to a water supply control circuit and a system thereof of a coffee machine.
Background
The existing coffee machine can use a container with specific capacity for brewing when water is supplied, the water supply adopts a timing mode, but the disadvantage of water supply of a high-low pressure plunger pump adopted by the existing coffee machine is that the water supply pressure is insufficient or the water flow is too small, namely the water flow is large when the low-pressure plunger pump is adopted, but the pressure is insufficient and the water flow is unstable; when a high-pressure plunger pump is adopted, the pressure is high, but the water flow is small, and the water flow is unstable.
Disclosure of Invention
The invention aims to provide a water supply control circuit of a coffee machine, which comprises a detection circuit, a regulation circuit, a driving circuit and a water supply pump, wherein the detection circuit is used for detecting an alternating current period and generating a zero-crossing signal to be fed back to the regulation circuit, the regulation circuit is used for generating a water supply pump driving signal and feeding back to the driving circuit, and the driving circuit drives the water supply pump to supply water;
the regulating circuit comprises a first operational amplifier U1, a second optocoupler module U2, a third optocoupler module U3, a first MOS transistor Q1, a second MOS transistor Q2, a third triode Q3, a fourth triode Q4, a fifth triode Q5, a first resistor R1, a second resistor R2, a third resistor R3, a first connecting end X1, a second connecting end X2, a third connecting end X3, a first switch SW1 and a first conversion switch P1, wherein the first connecting end X1 is connected with one end of the first resistor R1 through a first optocoupler module U1 through an in-phase end, the output end of the first operational amplifier U1 is connected with the grid electrode of the first MOS transistor Q1, the grid electrode of the second MOS transistor Q2 is connected with the grid electrode of the third MOS transistor Q2, the drain electrode of the second MOS transistor Q2 is connected with the emitter electrode of the third triode Q3, the base electrode of the third triode Q3 is connected with the base electrode of the fourth triode Q4 through the second resistor R2 through the first connecting end X5, the base electrode of the fifth triode Q5 is connected with the third connecting end X3, the third connecting end X3 is connected with the third switching switch U1 through the third resistor R3, the other end of the third optocoupler module U1 through the third optocoupler module U3, the other end of the third optocoupler module U1 is connected with the third triode Q2 through the other end, the third optocoupler module U2 is connected with the third triode Q2 through the third triode Q3 through the third triode Q2 through the emitter.
Further, the regulating circuit further comprises a sixth triode Q6, a seventh triode Q7, a fourth connecting end X4, a fifth connecting end X5, a sixth connecting end X6, a first relay module RL1 and a second relay module RL2, wherein a base electrode of the sixth triode Q6 is connected with the second connecting end X2, a base electrode of the seventh triode Q7 is connected with the third connecting end X3, a collector electrode of the sixth triode Q6, a collector electrode of the seventh triode Q7 and a power supply are connected, an emitter electrode of the sixth triode Q6 is connected with one end of a coil of the first relay module RL1, one end of a normally open contact of the first relay module RL1 is connected with the fourth connecting end X4, the other end of a normally open contact of the first relay module RL1 is connected with one end of a normally open contact of the second relay module RL2, the sixth connecting end X6 is connected with a public end of the first switch P1, the other end of a normally open contact of the second relay module RL2 is connected with the fifth connecting end X5, one end of a coil of the second relay module RL2 is connected with the other end of the coil of the seventh relay module RL2 and the coil of the first relay module RL2 is connected with the other end of the coil of the first relay module RL 2.
Further, the regulating circuit further comprises a fourth operational amplifier U4, a fifth digital potentiometer U5, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a second switch SW2, a third switch SW3, a seventh connecting end X7, a ninth operational amplifier U9, a tenth resistor R10 and a first capacitor C1, one end of the fourth resistor R4 is connected with a power supply, the other end of the fourth resistor R4 is connected with one end of the fifth resistor R5, the same-phase end of the fourth operational amplifier U4, the 12 pin of the fifth digital potentiometer U5, the 11 pin of the fifth digital potentiometer U5, one end of the tenth resistor R10 and the same-phase end of the ninth operational amplifier U9, the output end of the ninth operational amplifier U9 is connected with the seventh connecting end X7, the seventh connecting end X7 is connected with the second connecting end of the first conversion switch P1, the inverting end of the fourth operational amplifier U4 is connected with one end of the first capacitor C1, one end of the sixth resistor R6 and one end of the seventh resistor R7, the other end of the sixth resistor R6 is connected with the output end of the fourth operational amplifier U4 and the 10 pins of the fifth digital potentiometer U5, the 3 pin of the fifth digital potentiometer U5 is connected with one end of the eighth resistor R8 and one end of the second switch SW2, the 5 pin of the fifth digital potentiometer U5 is connected with one end of the ninth resistor R9 and one end of the third switch SW3, the other end of the second switch SW2 and the other end of the third switch SW3 are connected with a power supply, and the other end of the eighth resistor R8, the other end of the ninth resistor R9, the other end of the seventh resistor R7, the other end of the first capacitor C1, the other end of the fifth resistor R5 and the other end of the tenth resistor R10 are connected with a grounding end.
Further, the regulating circuit further comprises a sixth digital potentiometer U6, a seventh operational amplifier U7, an eighth digital amplifier U8, a tenth operational amplifier U10, an eighth triode Q8, a ninth MOS tube Q9, a tenth triode Q10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a third relay module RL3 and a second capacitor C2, the 5 pin of the sixth digital potentiometer U6 is connected with one end of the ninth resistor R9, the 3 pin of the sixth digital potentiometer U6 is connected with one end of the eighth resistor R8, the 12 pin of the sixth digital potentiometer U6 is connected with one end of the eleventh resistor R11, the in-phase end of the seventh operational amplifier U7, the inverting end of the eighth digital amplifier U8, the output end of the seventh operational amplifier U7 is connected with the output end of the eighth digital amplifier U8, the base of the thirteenth diode Q10, the emitter of the thirteenth electrode tube Q10 is connected with one end of a coil of the third relay module RL3, one end of a normally open contact of the third relay module RL3 is connected with the collector of an eighth triode Q8, one end of a twelfth resistor R12 and the grid electrode of a ninth MOS tube Q9, the drain of the ninth MOS tube Q9 is connected with one end of a thirteenth resistor R13 and one end of a fourteenth resistor R14, the other end of the thirteenth resistor R13 is connected with the base of the eighth triode Q8, the other end of the fourteenth resistor R14 is connected with one end of a second capacitor C2, the other end of a third relay module RL3 contact and the same phase end of a tenth operational amplifier U10, the output end of the tenth operational amplifier U10 is connected with the 5 pin of a sixth digital potentiometer U6, the 11 pin of the sixth digital potentiometer U6, the 10 pin of the sixth digital potentiometer U6, the other end of the twelfth resistor R12, the other end of the second capacitor C2 is connected with the ground end, the thirteenth electrode tube Q10, the collector of the eighth triode Q8, the other end of the eleventh resistor R11 is connected to a power supply.
Further, the regulating circuit further comprises a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-seventh resistor R27 and a twenty-eighth resistor R28, wherein one end of the twenty-sixth resistor R26, one end of the twenty-third resistor R23, one end of the twenty-seventh resistor R27 and a power supply are connected, one end of the twenty-fifth resistor R25, one end of the twenty-fourth resistor R24, one end of the twenty-eighth resistor R28 and a grounding end are connected, the other end of the twenty-sixth resistor R26 is connected with an inverting end of the seventh operational amplifier U7 and the other end of the twenty-fifth resistor R25, the other end of the twenty-third resistor R23 is connected with an in-phase end of the eighth digital amplifier U8 and the other end of the twenty-fourth resistor R24, and the other end of the twenty-seventh resistor R27 is connected with an inverting end of the tenth operational amplifier U10 and the other end of the eighth resistor R28.
Further, the regulation circuit further comprises a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19 and a twentieth resistor R20, one end of the seventeenth resistor R17 is connected with a power supply, the other end of the seventeenth resistor R17 is connected with the drain electrode of the first MOS tube Q1 and one end of the eighteenth resistor R18, the other end of the eighteenth resistor R18 is connected with one end of the nineteenth resistor R19 and the ground terminal, the other end of the nineteenth resistor R19 is connected with the source electrode of the second MOS tube Q2 and one end of the twentieth resistor R20, and the other end of the twentieth resistor R20 is connected with the power supply.
Furthermore, the regulating circuit further comprises a fifteenth resistor R15 and a sixteenth resistor R16, one end of the fifteenth resistor R15 is connected with a power supply, the other end of the fifteenth resistor R15 is connected with one end of the sixteenth resistor R16 and the inverting end of the first operational amplifier U1, and the other end of the sixteenth resistor R16 is connected with a grounding end.
Further, the regulating circuit further comprises a twenty-ninth resistor R29 and a thirty-ninth resistor R30, one end of the twenty-ninth resistor R29 is connected with the second connecting end X2, one end of the thirty-ninth resistor R30 is connected with the third connecting end X3, and the other end of the twenty-ninth resistor R29 and the other end of the thirty-ninth resistor R30 are connected with the ground end.
Furthermore, the regulating circuit further comprises a thirty-first resistor R31, one end of the thirty-first resistor R31 is connected with the grid electrode of the second MOS tube Q2, and the other end of the thirty-first resistor R31 is connected with the grounding end.
Further, the regulating circuit further comprises a twenty-first resistor R21 and a twenty-second resistor R22, one end of the twenty-first resistor R21 is connected with a power supply, the other end of the twenty-first resistor R21 is connected with the inverting end of the ninth operational amplifier U9, one end of the twenty-second resistor R22 is connected, and the other end of the twenty-second resistor R22 is connected with a grounding end.
The invention also provides a water supply control system of the coffee machine, which is based on the water supply control circuit of the coffee machine.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts double high-pressure water supply pumps to connect in parallel, works based on the characteristic of alternating current sine waves, mutually compensates the water pumping gap, improves the water pumping efficiency, and is suitable for water pumps of different models.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the prior art and the embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an overall structure provided by the present invention.
Fig. 2, fig. 3, and fig. 4 are schematic diagrams of a regulating circuit structure provided by the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, it being understood that the following text is only intended to describe one or more specific embodiments of the invention and is not intended to limit the scope of the invention as defined in the appended claims.
According to the invention, alternating signals are provided for two water supply pumps so as to mutually compensate a pump water gap, the pump water efficiency is improved, the specific process is that a detection module is used for detecting positive and negative half cycles of alternating current, when voltage or current crosses zero, the alternating current is fed back to a first connection end X1, a second connection end X2 and a third connection end X3 are two water supply pump starting signals, a first switch SW1 is a water supply starting signal, a first operational amplifier U1 outputs when a power supply passes zero, a first MOS tube Q1 and a second MOS tube Q2 are reversely output to a third triode Q3 and a fourth triode Q4, when the first operational amplifier U1 outputs, one of the third triode Q3 or the fourth triode Q4 outputs to a corresponding optocoupler module, the first switch SW1, the fifth triode Q5 and the third resistor R3 are used for stopping the output of the third triode Q3 and the fourth triode Q4, the second optocoupler module U2 and the third optocoupler module U3 are used for isolating driving signals, the alternating current is output when the first half cycles or the second half cycles of the second triode Q1 are full, the alternating current is full of the second pump is full, and the problem of the sinusoidal water supply pump is prevented from being caused when the half cycles of the first pump is full of water, and the full of the alternating current is full of the full of water, and the water supply efficiency of the second pump is full of working, and the problem is prevented.
Considering general problems, because the parameters of the water pump are inconsistent, the power supply parameters are fixed when the power grid is at home under general conditions, for example, the water pump under different parameters is still likely to have low efficiency if the water pump is alternately conducted only through zero crossing of alternating frequency, so that the signals of the second connecting end X2 and the third connecting end X3 are also fed back to the sixth triode Q6 and the seventh triode Q7, the first relay module RL1 and the second relay module RL2 are used as driving circuit switches, after the normally open contact of the first relay module RL1 or the second relay module RL2 is closed, the sixth connecting end X6 is used as a power driving signal of the fourth connecting end X4 and the fifth connecting end X5 to be fed back to the water supply pump, the first transfer switch P1 transfers the two modes, the public end of the first transfer switch P1 is connected with the sixth connecting end X6, the first input end of the first transfer switch P1 is connected with the seventh connecting end X7, the second input end of the first change-over switch P1 is connected with a power supply, the first mode is a basic mode (the second input end is short-circuited with the sixth connection end X6, the change-over switch is not shown in the drawing), a fixed driving signal is adopted to drive the alternate working water supply pump, the second mode is an adaptive mode (the first input end is short-circuited with the sixth connection end X6), the second mode can be adjusted according to different water pump parameters, when the first change-over switch P1 is changed to the second mode, the fourth resistor R4 and the fifth resistor R5 output bias signals to the fourth operational amplifier U4, the signal output by the fourth operational amplifier U4 is fed back to the fourth operational amplifier U4 through the fifth digital potentiometer U5, is output to the seventh connection end X7 after analog-digital conversion is carried out on the ninth operational amplifier U9, meanwhile, the sixth resistor R6 and the first capacitor C1 are integrated, after the output of the fourth operational amplifier U4 is stopped, the first capacitor C1 is output again through the seventh resistor R7 loop until the fourth operational amplifier U4, when the actual driving power of the water pump is low during the first mode, and the performance is not fully exerted, after the first mode is switched to the second mode, the feedback coefficient of the fifth digital potentiometer U5 is regulated through the second switch SW2 and the third switch SW3, the fourth operational amplifier U4 outputs interval change (driving frequency) until the water pump works in the optimal power, when the power supply parameter of the water pump is changed, the driving circuit can amplify the driving signal by adopting an amplifying circuit, and the detecting circuit can acquire the zero crossing signal through a zero crossing sensor or a comparing circuit.
In consideration of the simplicity of use of adjustment, the adjustment of the second switch SW2 and the third switch SW3 is changed into the adjustment through a second switch SW2, and the adjustment is automatically over-limited, in this scheme, the third switch SW3 is removed, the fifth digital potentiometer U5 and the sixth digital potentiometer U6 are connected and synchronously feed back the adjustment signals of the fifth digital potentiometer U5, the seventh operational amplifier U7 and the eighth digital amplifier U8 set the high limit and the low limit of the fifth digital potentiometer U5, the limit range is that the voltage dividing bias amplitude of the fourth resistor R4 and the fifth resistor R5 is higher than the highest voltage in the curve of the sixth resistor R6 and the first capacitor C1, that is, the feedback amplification factor of the fourth operational amplifier U4 and the fifth digital potentiometer U5 is lower than the highest voltage at the end of the first capacitor C1, when the second switch SW2 is closed, the fifth digital potentiometer U5 is adjusted to the seventh operational amplifier U7 and the eighth digital amplifier U8, the thirteenth transistor Q10 is turned on, the eighth transistor Q8 is turned on, the frequency of the eighth transistor Q8 is turned on, the power amplifier Q10 is turned off, the signal is driven by the thirteenth transistor Q5, the power amplifier is turned on, the output by the thirteenth transistor Q5 is turned on, and the power amplifier is turned on by the fifth transistor Q5, and the signal is turned on by the maximum voltage. The reference signals of the seventh operational amplifier U7, the eighth digital amplifier U8, the ninth operational amplifier U9, the tenth operational amplifier U10 and the first operational amplifier U1 and the power supply of the first MOS transistor Q1 and the second MOS transistor Q2 can be set by the voltage division of corresponding connected resistors, and can also be directly supplied by other power supplies, the thirty-first resistor R31 is used for increasing the parasitic loop release speed of the first MOS transistor Q1 and the second MOS transistor Q2 for responding to the resistor, and the twenty-ninth resistor R29 and the thirty-first resistor R30 are used for the suspension time loop of the second connecting end X2 and the third connecting end X3.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The water supply control circuit of the coffee machine is characterized by comprising a detection circuit, a regulation circuit, a driving circuit and a water supply pump, wherein the detection circuit is used for detecting an alternating current period and generating a zero-crossing signal to be fed back to the regulation circuit, the regulation circuit is used for generating a driving signal of the water supply pump and feeding back to the driving circuit, and the driving circuit drives the water supply pump to supply water;
the regulation circuit comprises a first operational amplifier, a second optocoupler module, a third optocoupler module, a first MOS tube, a second MOS tube, a third triode, a fourth triode, a fifth triode, a first resistor, a second resistor, a third resistor, a first connecting end, a second connecting end, a third connecting end, a first switch and a first change-over switch, wherein the first connecting end is connected with one end of the first resistor and the same phase end of the first optoamplifier, the first MOS tube, the second MOS tube and the inverting end of the first optoamplifier provide reference signals through voltage division or a power supply, the output end of the first optoamplifier is connected with the grid electrode of the first MOS tube, the grid electrode of the second MOS tube, the drain electrode of the second MOS tube is connected with the emitting electrode of the third triode, the base electrode of the third triode is connected with the base electrode of the fourth triode, one end of the second resistor, the collector electrode of the fifth triode is connected with one end of the first switch, one end of the third resistor is connected with the source electrode of the fourth MOS tube, the third triode is connected with the anode and the second optocoupler module, the output end of the third optocoupler module is connected with the other end of the third triode, the other end of the third triode is connected with the anode and the third triode, the other end of the third optocoupler module is connected with the third cathode is connected with the other end of the third optocoupler module, and the other end of the third optocoupler is connected with the third resistor.
2. The water supply control circuit of claim 1, wherein the regulating circuit further comprises a sixth triode, a seventh triode, a fourth connection end, a fifth connection end, a sixth connection end, a first relay module, and a second relay module, wherein the sixth triode base is connected with the second connection end, the seventh triode base is connected with the third connection end, the sixth triode collector, the seventh triode collector are connected with a power supply, the sixth triode emitter is connected with one end of a coil of the first relay module, one end of a normally open contact of the first relay module is connected with the fourth connection end, the other end of the normally open contact of the first relay module is connected with one end of a normally open contact of the second relay module, the sixth connection end is connected with a common end of the first switch, the other end of the normally open contact of the second relay module is connected with the fifth connection end, one end of a coil of the second relay module is connected with the seventh triode emitter, and the other end of a coil of the first relay module, the other end of the coil of the second relay module is connected with a ground.
3. The water supply control circuit according to claim 1, wherein the regulating circuit further comprises a fourth operational amplifier, a fifth digital potentiometer, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a second switch, a third switch, a seventh connection terminal, a ninth operational amplifier, a tenth resistor, a first capacitor, one end of the fourth resistor is connected to the power supply, the other end of the fourth resistor is connected to one end of the fifth resistor, the same-phase end of the fourth operational amplifier, the 12 pin of the fifth digital potentiometer, the 11 pin of the fifth digital potentiometer, one end of the tenth resistor, the same-phase end of the ninth operational amplifier, the output end of the ninth operational amplifier is connected to the seventh connection terminal, the seventh connection terminal is connected to the second connection terminal of the first transfer switch, the inverting end of the fourth operational amplifier is connected to one end of the first capacitor, one end of the sixth resistor, one end of the seventh resistor, the other end of the sixth resistor is connected to the output end of the fourth operational amplifier, the 10 pin of the fifth digital potentiometer, the 3 pin of the fifth digital potentiometer is connected to the other end of the fifth resistor, the other end of the eighth resistor is connected to the other end of the eighth resistor, the other end of the eighth resistor is connected to the other end of the eighth resistor, the other end of the seventh resistor is connected to the other end of the eighth resistor, the other end of the eighth resistor is connected to the other end of the fifth resistor, and the other end of the fifth resistor is connected to the other end of the fourth resistor.
4. The water supply control circuit according to claim 3, wherein the regulating circuit further comprises a sixth digital potentiometer, a seventh operational amplifier, an eighth digital amplifier, a tenth operational amplifier, an eighth triode, a ninth MOS transistor, a thirteenth transistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a third relay module, and a second capacitor, wherein the 5 pin of the sixth digital potentiometer is connected to one end of the ninth resistor, the 3 pin of the sixth digital potentiometer is connected to one end of the eighth resistor, the 12 pin of the sixth digital potentiometer is connected to one end of the eleventh resistor, the same-phase end of the seventh operational amplifier, the inverting end of the eighth digital amplifier, the output end of the seventh operational amplifier is connected to the base of the eighth digital amplifier, the emitter of the tenth triode is connected to one end of the third relay module, one end of the normally open contact of the third relay module is connected to the collector of the eighth resistor, one end of the twelfth resistor, the gate of the ninth MOS transistor is connected to one end of the thirteenth resistor, the one end of the fourteenth resistor is connected to the thirteenth resistor, the other end of the thirteenth resistor is connected to the other end of the thirteenth resistor, the 3 pin of the sixth digital potentiometer is connected to one end of the eighth resistor, the other end of the eighth resistor is connected to the other end of the eleventh resistor, the other end of the same-phase end of the eighth resistor is connected to the same-phase end of the eighth resistor, the output end of the eighth resistor is connected to the same-phase end of the eighth resistor, and the other end of the output of the eighth resistor is connected to the same base.
5. The water supply control circuit of claim 4, wherein the regulating circuit further comprises a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, and a twenty-eighth resistor, wherein one end of the twenty-sixth resistor, one end of the twenty-third resistor, one end of the twenty-seventh resistor, and a power supply are connected, one end of the twenty-fifth resistor, one end of the twenty-fourth resistor, one end of the twenty-eighth resistor, and one end of the twenty-eighth resistor are connected to a ground, the other end of the twenty-sixth resistor is connected to an inverting end of the seventh operational amplifier, the other end of the twenty-fifth resistor, the other end of the twenty-third resistor is connected to an in-phase end of the eighth digital amplifier, the other end of the twenty-fourth resistor, the other end of the twenty-seventh resistor is connected to an inverting end of the tenth operational amplifier, and the other end of the twenty-eighth resistor.
6. The water supply control circuit according to claim 1, wherein the regulating circuit further comprises a seventeenth resistor, an eighteenth resistor, a nineteenth resistor and a twentieth resistor, one end of the seventeenth resistor is connected with the power supply, the other end of the seventeenth resistor is connected with the drain electrode of the first MOS tube and one end of the eighteenth resistor, the other end of the eighteenth resistor is connected with one end of the nineteenth resistor and the ground end, the other end of the nineteenth resistor is connected with the source electrode of the second MOS tube and one end of the twentieth resistor, and the other end of the twentieth resistor is connected with the power supply.
7. The water supply control circuit according to claim 1, wherein the regulating circuit further comprises a fifteenth resistor and a sixteenth resistor, one end of the fifteenth resistor is connected with the power supply, the other end of the fifteenth resistor is connected with one end of the sixteenth resistor and the inverting end of the first operational amplifier, and the other end of the sixteenth resistor is connected with the ground.
8. The water supply control circuit of claim 1, wherein the regulating circuit further comprises a twenty-ninth resistor and a thirty-ninth resistor, one end of the twenty-ninth resistor is connected with the second connection terminal, one end of the thirty-ninth resistor is connected with the third connection terminal, and the other end of the twenty-ninth resistor, the other end of the thirty-ninth resistor and the ground terminal are connected.
9. The water supply control circuit according to claim 1, wherein the regulating circuit further comprises a thirty-first resistor, one end of the thirty-first resistor is connected with the gate of the second MOS transistor, and the other end of the thirty-first resistor is connected with the ground terminal; the regulating circuit further comprises a twenty-first resistor and a twenty-second resistor, one end of the twenty-first resistor is connected with a power supply, the other end of the twenty-first resistor is connected with the inverting end of the ninth operational amplifier and one end of the twenty-second resistor, and the other end of the twenty-second resistor is connected with a grounding end.
10. A water supply control system for a coffee machine, the system being based on a water supply control circuit for a coffee machine according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311457301.2A CN117492396B (en) | 2023-11-03 | 2023-11-03 | Water supply control circuit and system of coffee machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311457301.2A CN117492396B (en) | 2023-11-03 | 2023-11-03 | Water supply control circuit and system of coffee machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117492396A CN117492396A (en) | 2024-02-02 |
| CN117492396B true CN117492396B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311457301.2A Active CN117492396B (en) | 2023-11-03 | 2023-11-03 | Water supply control circuit and system of coffee machine |
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| CN (1) | CN117492396B (en) |
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| CN117492396A (en) | 2024-02-02 |
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